Assume that a state and the federal government hold concurrent jurisdiction over an issue and furthermore, both have enacted statutes to regulate the subject. However the state statute is contrary to the federal law. The state law is .

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education